762f9ef3d9
Improve the autoconf code for finding libtirpc and do not assume the headers are in /usr/include/tirpc. Also remove this assumption from the `rpc/xdr.h` header in libspl and use the same `#include_next` mechanism that is used for other libspl headers. Include pkg.m4 from pkg-config in config/ for PKG_CHECK_MODULES(), the file license allows this. Include ax_save_flags.m4 and ax_restore_flags.m4 from autoconf-archive, the file licenses are compatible. Use the 2012 versions so as not rely on a more recent autoconf feature AS_VAR_COPY(), which breaks some build slaves. Add new macro library `config/find_system_library.m4` which defines the FIND_SYSTEM_LIBRARY() macro which is a convenience wrapper over using PKG_CHECK_MODULES() with a fallback to standard library locations and some sanity checks. The parameters are: ``` FIND_SYSTEM_LIBRARY(VARIABLE-PREFIX, MODULE, HEADER, HEADER-PREFIXES, LIBRARY, FUNCTIONS, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) ``` `HEADER-PREFIXES` and `FUNCTIONS` are comma-separated m4 lists. For libtirpc we are using: ``` FIND_SYSTEM_LIBRARY(LIBTIRPC, [libtirpc], [rpc/xdr.h], [tirpc], [tirpc], [xdrmem_create], [], [...]) ``` The headers are first checked for without the prefixes and then with. This system works with pkg-config and falls back on checking standard header/library locations, it can be easily overridden by the user by setting the `PREFIX_CFLAGS` and `PREFIX_LIBS` variables which are automatically added to the `./configure --help` output. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rafael Kitover <rkitover@gmail.com> Closes #7422 Closes #8313
32 lines
881 B
Plaintext
32 lines
881 B
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_restore_flags.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_RESTORE_FLAGS()
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#
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# DESCRIPTION
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#
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# Restore common compilation flags from temporary variables
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#
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# LICENSE
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#
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# Copyright (c) 2009 Filippo Giunchedi <filippo@esaurito.net>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 3
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AC_DEFUN([AX_RESTORE_FLAGS], [
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CPPFLAGS="${CPPFLAGS_save}"
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CFLAGS="${CFLAGS_save}"
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CXXFLAGS="${CXXFLAGS_save}"
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OBJCFLAGS="${OBJCFLAGS_save}"
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LDFLAGS="${LDFLAGS_save}"
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LIBS="${LIBS_save}"
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])
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